Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

1948 Westinghouse Model 1821 (182) audio problems
#40

Quote:Even 50 is wrong. Should not exceed 40uF.


morzh, 50 MFD is NOT incorrect, that's what's in there right now, its a 3 section can that has 2 sections that are rated at 50 MFD @ 150 WVDC and then a 3rd section that is 20 MFD @ 25 WVDC, the filter cap can that's in there right now is the original unit to the radio, the Riders even calls for a 50/50 MFD @150 WVDC  and 20 MFD @ 25 WVDC.

Unfortunately there's no such thing as a 50 MFD cap anymore since they changed the capacitor rating system back in the 1970s, so the next closest thing is a 47 MFD (which I don't have on hand right now, I would have to order it) or a 68 MFD Cap (which I don't have any of those around either and those would have to be ordered too).

So either way right now the only capacitor I had on hand was the one that could replace the 20 MFD at 25V unit, which I replaced that with a 22 MFD at 63V.

But the good thing is, the place where all of the e-caps need to go are conveniently located near a terminal strip with an unused lug that ties to chassis ground so all I need to do is get some axial lead 47 MFD or 68 MFD @ 160 V e-caps to replace the remaining sections of the old can and solder the negative leads to the unused terminal strip that's tied to chassis ground and then tie the positive leads to their respective terminal leads, and that has eliminated about a foot and a half of wire out of the chassis that was used to connect the old can cap to their respective tie points, and thus cleaning up the chassis more.

Also in regards to the output transformer that I had said was "dead" it actually isn't because when I was probing around in the radio with it turned on with my DMM (the radio was plugged into an isolation transformer) I was able to get it to produce a hum, a loud hum at that, so I'm wondering if there isn't a cold solder joint on one of the output transformer primary leads and where they connect.


Messages In This Thread
RE: 1948 Westinghouse Model 1821 (182) audio problems - by captainclock1988 - 09-10-2020, 10:32 AM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM

[-]
Who's Online
There are currently 1875 online users. [Complete List]
» 1 Member(s) | 1874 Guest(s)
Avatar

>